.box {
  margin-left: 40px;
  width: 200px;
  height: 500px;
  background-color: aqua;
  flex-direction: column;
  overflow-y: auto;
  .box_child1 {
    width: 100px;
    height: 900px;
    background-color: red;
  }
  .box_child2 {
    width: 100px;
    height: 900px;
    background-color: pink;
  }
}

.font-box {
  &-text {
    font-size: 18px;
  }
}
